The boat has been developed over the last 4 years, the Stealth R is no longer made, its performance differs from the new boat by 1%, and as such it is grandfathered into the brand new f16 class, it will be slightly slower than the new boat, but it was deemed that the grandfathered boats performances are close enough to provide good racing.
The boats do each have a yardstick (handicap), the Stealth R is 102 and the F16hp is 101.
As a fleet we have decided to support F16 so the Stealth Rs can either sail in handicap races or scratch against other f16s.